/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/Framework/PhysicsProxy.h
The Particle Binding creates a connection between the particles in the simulation and the solver objects dataset.
void BindParticleCallbackMapping ( [Chaos::TArrayCollectionArray](API\Runtime\Engine\Physics\Experimental\TArrayCollectionArray)< [PhysicsProxyWrapper](API\Runtime\Chaos\Chaos\Framework\PhysicsProxyWrapper) > & PhysicsProxyReverseMap, [Chaos::TArrayCollectionArray](API\Runtime\Engine\Physics\Experimental\TArrayCollectionArray)< int32 > & ParticleIDReverseMap )